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Teardown of a Failed Linux LTS Spectre Fix
An in-depth analysis of the journey of a Spectre fix into the upstream LTS kernels that left its users with nothing more than a false sense of security.
Topics /
Systems & Performance
The most popular blog posts about systems & performance on Hacker News. 2,560 posts.
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Using SIMD to aggregate billions of values per second
How SIMD instructions make aggregations faster in QuestDB, including benchmark results and a comparison with Postgres.
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Rustls Server-Side Performance
In past years, the Rustls project has been happy to receive substantial investments from the ISRG. One of our goals has been to improve performance without compromising on safety. We last posted about our performance improvements in October of 2024, and we're back to talk about another round of improvements. What is…
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Coreboot and Skylake, Part 2: A Beautiful Game
Purism makes premium phones, laptops, mini PCs and servers running free software on PureOS. Purism products respect people's privacy and freedom while protecting their security.
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PureBoot, the High Security Boot Process
Purism makes premium phones, laptops, mini PCs and servers running free software on PureOS. Purism products respect people's privacy and freedom while protecting their security.
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Hyperlight: Virtual machine-based security for functions at scale
The Microsoft Azure Core Upstream team is excited to announce the Hyperlight project, an open-source Rust library you can use to create very small VMs for embedded functions. Learn more.
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Format string vulnerability found in 'sudo'
A flaw exists in the debugging code in sudo versions 1.8.0 through 1.8.3p1 that can be used to crash sudo or potentially allow an unauthorized user to elevate privileges. Sudo versions affected: 1.8.0 through 1.8.3p1 inclusive. Older versions of sudo are not affected. CVE ID: This vulnerability has been assigned…
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Jepsen: TiDB 2.1.7
In 2010, Google engineers Daniel Peng & Frank Dabek published Large-scale Incremental Processing Using Distributed Transactions and Notifications , which described Percolator: a Google-internal database for random access transactional workloads where low latencies are not required. Percolator uses a global…
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Staring at the Sun: Dalvik vs. Asm.js vs. Native
As many of you are probably already aware, Mozilla has recently gotten into the mobile OS space with Firefox OS. Firefox OS is built using ...
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Look Before You Leap – The Coming Leap Second and AWS
My colleague Mingxue Zhao sent me a guest post designed to make sure that you are aware of an important time / clock issue. Note: This post was first published on May 18, 2015. We made some important additions and corrections on May 25, 2015. — Jeff; The International Earth Rotation and Reference Systems (IERS) […]
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Allocating on the Stack
A description of some of the recent changes to do allocations on the stack instead of the heap.
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CentOS Stream
Today, Red Hat has introduced a new Linux development model into the CentOS community: CentOS Stream, a developer-forward, faster-moving distribution that helps community members, partners and others take full advantage of open innovation.
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Erlang ARM32 JIT is born
A modular embedded ecosystem—bare-metal hardware, software stacks, and a cloud platform for real-time IoT and distributed systems.
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Magic-trace: Diagnose tricky performance issues with Intel Processor Trace
Intel Processor Trace is a hardware technology that can record all program execution flow along with timing information accurate to around 30ns. As far as I ...
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Efficient string copying and concatenation in C
Martin Sebor looks at C string handling functions used to copy and concatenate strings and examines ways to improve their efficiency.
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Node.js running in the new Airbus A350 inflight servers
A couple of months ago Finnair announced the launch of the new A350 aircraft, making it the first European airline to start operating the model. We are
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JIT-optimized Ruby can outperform a C extension
YJIT’s ability to improve performance by adapting to run-time behavior can increase the speed of our code in a way that dropping down to C can’t. As such, I think we should reconsider the common wisdom that “rewriting our Ruby in C” is the ideal path to performance optimization and take a serious look at “rewriting…
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LevelDB: A Fast Persistent Key-Value Store
The latest news from Google on open source releases, major projects, events, and outreach programs for early career developers.
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Faster filesystem access with Directfs
Directfs is now the default in runsc. This feature gives gVisor’s application kernel (the Sentry) secure direct access to the container filesystem, avoiding expensive round trips to the filesystem gofer. Learn more about this feature in the following blog that was originally posted on Google Open Source Blog .
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SVT-AV1: open-source AV1 encoder and decoder
by Andrey Norkin, Joel Sole, Mariana Afonso, Kyle Swanson, Agata Opalach, Anush Moorthy, Anne Aaron
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Hybridizer: High-Performance C# on GPUs
Hybridizer is a compiler from Altimesh that lets you program GPUs and other accelerators from C# code or .NET Assembly. Using decorated symbols to express parallelism, Hybridizer generates source code…
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Down the 'ls' Rabbit Hole
By: Adam Fletcher ( @adamfblahblah ) From ls(1) to the kernel and back again. Too often sysadmins are afraid to dive into the sou...
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Rumors of Cmd’s death have been greatly exaggerated
This post is in response to a story published on December 6th 2016 by ComputerWorld titled "Say goodbye to the MS-DOS command prompt" and its follow-up
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Android 12 is live in AOSP
News and insights on the Android platform, developer tools, and events.
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Swift Distributed Actors
We’re thrilled to announce a new open-source package for the Swift on Server ecosystem, Swift Distributed Actors, a complete server-oriented cluster library for the upcoming distributed actor language feature!